Combined seat post and extension



FIG. 1 is a perspective view of the combined seat post and extension ofour new design;

FIG. 2 is a side elevational view thereof, the opposite side being amirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a combined seat post and extension, as shownand described.